Transmitter for electric writing-telegraphs.



E. H. & K. A. WIDEGREN. TRANSMITTER FOR ELECTRIC WRITING TELEGRAPHS.

APPLICATION FILED DEC.20. 1913.

PatentedSept. 21, 1915.

EMIL HENRIK AND KLAS AUG'US'IE WIDEGBEN, 0F ALBY,

TRANSHITTEE FOR ELECTRIC WEI'I'ING-TELEGBAFHQ.

of Alby, Sweden, have invented new and useful Improvements inTransmitters for Electric Writing-Telegraphs, of which the following isa specification.

Our invention relates to electric writ ng telegraphs which are actuatedby pulsating currents generated by means of a continuously rotatingcommutator along whlch one or more brushes may be moved. Such anapparatus is for instance described in our U. S. Patent No. 1054811. Inorder that a such apparatus shall work satisfactory, it is necessarythat the movements of the current collecting brush or brushes take placein strict correspondence with the movements of the writing pen of thetransmitter. By means of the devices heretofore used for transmittingmovements from the writing pen to the brushes no such strictcorrespondence has been attained, andon account thereof the writing inthe recelver has been uneven and distorted so that it does not renderdistinctly the handwriting put down in the transmitter, as is to bedesired in apparatus of this kind. p a

Our invention relates to a simple dev ce for transmitting movements fromthe writing pen of the transmitter to the current collecting brush orbrushes of the commutator by which invention back-lash or otherirregularities in the movements of the brush relative to thewriting penare obviated as far as possible. The invention consists, chiefly, inthis that the current collecting brush bearing against the commutator ispivoted on a center and by means of a con- 7 meeting rod or armconnected to the writing pen of the transmitter.

Two difi'erent forms of the invention are illustrated in theaccompanying drawing in which Figure 1 shows a plan view of one form,while Fig. 2 shows a plan view and Fig. 3 a side view of the other form.The

arts of the transmitter shown in the drawmg are those relating to thepresent invention, while other parts, especially the diagram of theconnections, are omitted for the sake of simpleness. I

Relating to Fig. 1, 1, 2 designate a double commutator roller connected,by means of suitable circuit connections (not shown on the drawing) toasource of continuous elecspecification of Letters Patent. Applicationfiled Deoember a, was. seen Eto. t97,9lt.

Y the arms Patented bent. at, 1%115.

tric current. Bearing against each of the rollers l and-2 is a slidingbrush 3' and a respectively supported by-an arm 7 and 8 respectivelywhich is pivoted on a center 5 and 6' respectively. Rigidly connectedwith and 8 are other arms 9 and. it? re spectively connected by means ofrods iii and 12 to the writing pen 13 of the transmitter.

On moving the writing pen across the writing plane 14 the arms 7, 9 and8, 10 are turned about their centers fiend 6 respectively, and thebrushes are, on account thereof, moved along the rollers i. and 2. Sincein this arrangement for transmitting movements from the writing pen tothe slidin brushes joints occur at the rods 11 and 12 on y which jointswithoutany dificulty' can be edected without back-lash, it is attainedthat the brushes may be brought to follow the movements of the writingpen with necessary exactness.

The form-shown in Figs. 2 and 3 difiers from that shown in Fig. 1 onlyin this that the brushes 3 and a bear against the per side and the lowerside. respectivelygoi the same commutator roller 15. The pivcts 5 and 6of the brush arms 7, 9 and 8, 10 are located at each side of thecommutator roller,

and the writing plane it is placed above the,

roller in ct er respects, the device for transmitting movements from thewriting pen 13 to the brushes 3 and 4 corresponds to 1 graphs includinga rotary commutator adapted to emit pulsating currents, a brush bearingon sald commutator, a holder carrying said'brush, said holder beingarranged to swing in a plane essentially parallel to the axis of thecommutator, a hand operated writing pen, and a mechanical connectionbetween the pen and the said holder.

2. A transmitter for electric writing telegraphs, including a rotarycommutator adapted to emit pulsating currents, brushes bearing on eachside of said commutator, a holder for each of said brushes, said holdersbemg arranged to swing in planes essentially parallel to.v the axis ofthe commutator, a hand operated Writing pen, and mechanical connectionsbetween the pen and the said holders.

3. A transmitter for electric writing telegraphs, includiz? a rotarycommutator havmg curve-shape commutator bars, a brush ing sa1d brush,said holder being "arranged to swing in a plane essentially parallel tothe agris of the commutator, a hand operated writing pen, and amechanical connection table, a rotary commutator, brushes bearing onsaid commutator, a holder carrying said brushes, said holders beingarran ed to swin in a plane essentially paralle to the ax s of thecommutator, and-16 mechanical connections between the pen and the saidholders.

In testimony that we'claim the foregoing as'our mvention, we havesigned-our names in presence of two subscribing witnesses.

EMIL HENRIK WIDEGREN. I I KLAS AUGUST WIDEGREN.-

Witnesses:

CUNo SQCHWIN, HILDUR HAKANsEN;

